Run in stand/dyno build.

[BobHorowitz]

Terry,
What tool post is that on your lathe? Never seen one like that.
Bob

 

[Terry Keeley]

Terry,
What tool post is that on your lathe? Never seen one like that.
Bob

Dickson from England supplied them to Emco, very nice:

http://www.lathes.co.uk/latheparts/page13.html

 

[Rick Sowell]

Following along this project, very cool. but how did you cut the keyway in the inner bearing race?

 

[Terry Keeley]

Following along this project, very cool. but how did you cut the keyway in the inner bearing race?

It comes that way. Trick will be to cut the pocket in the 60Rc Thompson shaft.

My "Conseillere" gave me some ideas tho...

 

[Brad Christy]

Terry,

Spin the bejeezus out of a carbide end mill and give it lots of dry air to keep it cool.

You'd be surprised. 60Rc really isn't all that hard to a 90+Rc carbide end mill.

Thanks. Brad.
Titan Racing Components
BlackJack Hydros
Model Machine and Precision LLC

 

[Terry Keeley]

Let the next phase begin...

 

[Terry Keeley]

 

[Terry Keeley]

 

[Terry Keeley]

 

[Terry Keeley]

Everything lined up & dowel pinned, bearing pockets and oil channels are next. One sub plate is for the break in fan, the other for the dyno wheel.

 

[AlexPoca]

Very nice work Terry..

 

[RaceMechaniX]

Very nice work Terry. Seeing you check concentricity of your blocks made me pull up this video of air bearings. Some very special motor dyno's use these for near frictionless torque reaction cradle measurements.

 

[John Beardslee]

Everything lined up & dowel pinned, bearing pockets and oil channels are next. One sub plate is for the break in fan, the other for the dyno wheel.

Terry are you using adjustable drip oilers to lube the bearings?

 

[Terry Keeley]

Very nice work Terry. Seeing you check concentricity of your blocks made me pull up this video of air bearings. Some very special motor dyno's use these for near frictionless torque reaction cradle measurements.

Very cool, I could slide my small sub plates over my surface plate with little effort showing how flat they were.

Here's a very talented Toolmaker that made a lathe/grinder with air bearings:

Terry are you using adjustable drip oilers to lube the bearings?

Yup. Going to mount them on the top of the pillow blocks off to the side to clear the pipe and run 1/16" holes to the back of the bearing pockets.

 

[John Beardslee]

Very cool, I could slide my small sub plates over my surface plate with little effort showing how flat they were.

Here's a very talented Toolmaker that made a lathe/grinder with air bearings:










Yup. Going to mount them on the top of the pillow blocks off to the side to clear the pipe and run 1/16" holes to the back of the bearing pockets.

There you go, just what I was thinking. Next question will be what oil? I’d go for turbine oil, spindle oil or air tool oil all used in high rpm applications.
Thanks John

 

[Terry Keeley]

Got some Shell spindle oil for my reciprocating grinder that'll work good I'm sure. Great after run oil too!

 

[John Beardslee]

Got some Shell spindle oil for my reciprocating grinder that'll work good I'm sure. Great after run oil too!

Perfect, that’s what I use in my Dumore tool post grinder as well.

 

[LohringMiller]

Terry, you have the world's cleanest shop. It reminds me of a tool maker I once worked with. He wore a clean white shirt to work every day. He did roll up his sleeves, but left at the end of the day with his shirt still clean. It's a sign of equally immaculate work.

Lohring Miller

 

[Terry Keeley]

Terry, you have the world's cleanest shop. It reminds me of a tool maker I once worked with. He wore a clean white shirt to work every day. He did roll up his sleeves, but left at the end of the day with his shirt still clean. It's a sign of equally immaculate work.

Lohring Miller

Thanks, it's a sickness actually. I've been in therapy for many years with little improvement, in fact I think it's getting worse the older I get.

I'm trying to get this "right" for a couple reasons. One so it gives good, repeatable results and two so it doesn't vibrate apart at 30K. But looking at tenths as if they were thousands for the past couple weeks is getting old, glad that part is almost over...

 

[Jim Allen]

Great job Terry. It shows you can work to tenths with manual tools. I have tested my dyno up to 40,000+ RPM. Rigidity & concentricity of any rotating part makes this possible.